abstract
ahead
alert
arrow
arrows
asphalt
automobile
background
car
caution
cement
city
concept
control
danger
direction
directional
drive
floor
forward
highway
information
lane
line
outdoor
pavement
road
roadside
roadsign
roadway
safety
sign
signal
speed
straight
street
surface
symbol
targeted
tire
traffic
trafficsign
transport
transportation
travel
warning
way
white